Make libprotobuf available to CompOS

Bug: 161471326
Test: Builds
Change-Id: I92ecb1f69ab6b78275be2fa7e336535f42207f5e
diff --git a/cargo2android.json b/cargo2android.json
index 85afab5..c983075 100644
--- a/cargo2android.json
+++ b/cargo2android.json
@@ -1,6 +1,7 @@
 {
   "apex-available": [
     "//apex_available:platform",
+    "com.android.compos",
     "com.android.virt"
   ],
   "copy-out": true,
@@ -8,4 +9,4 @@
   "device": true,
   "features": "bytes",
   "run": true
-}
\ No newline at end of file
+}